8.37 If you want to be 95% confident of estimating the popula- tion proportion to within a sampling error of {0.02 and there is historical evidence that the population proportion is approximately 0.40, what sample size is needed

step-by-step explanation:

5 x 14?

im new, sorry if this is wrong.

step-by-step explanation:

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.